Improvement in double-acting force-pumps



Double-Acting Farce-Pumps. No. 140,819l Paiemedmlylngs.

3 Shets--Sheet 2. j. P. FLANDERS.

Double-Acting Force-Pumps.

3 Sheets--Sheet 3.

1. P.v FL'ANMRS. Unable-Acting Force-Pumps.

Patented July l5, 1873.

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AM. PHoro-umas/rAPH/c co. Mx (asma/w3n mams) UNITED STATES PATENT OFFICE.

JOHN FLANDERS, OF VERGENNES, ASSIGNOR TO HIMSELF, ELI B. HAYES, OF SAME PLAGE, AND H. M. MITCHELL, lOF BURLINGTON, VERMONT.

IMPROVEMENT IN DOUBLE-ACTING FORCE-PUMPS.

Specification iormin g part of Letters Patent No. 140,819, dated July 15, 1873 5 application iiled April 5, 1873.

`To all whom tt may concern:

Be it known that I, J oHN I). FLANDEEs, of Vergennes, in the county of Addison and State of Vermont, have invented a new and useful Improvement in Force-Pumps, of which the following is a specification:

The invention consists in the improvement of force-pumps, as hereinafter described and pointed out in the claims. A Figure 1 is a side elevation of my improved pump. Fig. 2 is a transverse section on line fe a: of Fig. 3. Fig-3 is a horizontal section on line y y of Fig. 2. Fig. 4 is a cross-section of the longitudinally-divided barrel.

Similar letters of reference indicate correspondin g parts.

A represents the cylinders, which are arranged on each side of a wide bed-frame, B.

` (l represents the suction-pipes, of which there chamber. is apipe from which the water l l I 'is discharged from the box I, and M is an airchamber.

For packing the pistons I propose to have the barrels N, in which they work, divided in two or more longitudinal parts with lap-joints at the edges, so that they can contract and expand a little without opening seams for the escape of water, and I provide a small annular channel, O, surrounding the barrel, in which I maintain a high degree of pressure by Water admitted through a pipe-connection, P, from any suitable head or source, and, to prevent this water from leaking past the barrel, I arrange packin g-rin gs in the channel. To hold the barrel in position and allow them to be free to expand and contract, I form notches R inthe shell in ther cylinder, and lugs in the barrels, which project into the notches and hold the barrels against the end motion.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The arrangelnent of the cylinders A, bedframe B, suction-pipes O 1), discharge-pipes F G, discharge-box I, and the air-chamber, substantially as specified.

2. A sectional piston-barrel, contracted upon the piston for packing it by hydrostatic pressure, applied in the manner described.

JOHN P. FLANDERS.

Witnesses:

GEo. R. CHAPMAN, J. E. YOUNG. 

